The skilful playmaker played a key role in his side's outstanding 3-1 weekend quarter-final victory over Camelon and is certainly no stranger to the business end of the game's No.1 competition.
McLay has yet to taste victory in four penultimate showdowns – twice with Maryhill and twice with Pollok – so not surprisingly he is setting his sights on getting over this "final hurdle from home" in what is shaping up as his last hurrah on the Emirates Cup front.
Now before Glens supporters get themselves in a state of flux, he has not intimated any intention to call it a day and retire come the end of this season.
However, it's hard to conclude otherwise given that the Shettleston-based ace – who turns 41 this year – is the oldest outfield player still standing in the cup.
He said: "Saturday's big game atmosphere undoubtedly brought out the best in me and I will never tire of being involved on these occasions.
"That's not always been the case as I have often found it hard to be up for certain run-of-the-mill Glencairn games this season and there's no doubt my enthusiasm is on the wane as I get older.
"That's not to say I will give anything less than 100% every time I pull on a jersey, however the days of me being capable of performing at my best week in and week out are now a thing of the past.
"Thankfully our gaffer Willie Harvey knows this better than most and he has probably added a season or two onto my career, carefully nursing me through training sessions on top of picking and choosing certain games to give me a rest. The upshot is that things are going really well just now and I'm feeling in great nick.
"However, there's no doubt we will have to take stock of what our plans are with the start of midweek games about to hit us around the same time as the semi-final double-header is to be played."
The veteran campaigner also owned up to deriving a greater sense of satisfaction from helping Glencairn into the Scottish semis than he ever did with Maryhill and Pollok.
He added: "Both my former clubs were rated big guns in Junior circles and it was expected that they would figure in the latter rounds of the cup.
"Glencairn have themselves a great history but by comparison they are lightweights in the game and moreso given we are a mere Super First Division side pitching ourselves against some of the biggest clubs in the land.
"Nobody gives us a chance of going all the way and probably rightly so given the quality of teams left in the competition, but by the same token neither are we going to be cannon fodder for anyone."
Andy has clearly endeared himself to Glens supporters judging by the particularly rousing reception he received when coming off against Camelon with 10 minutes left to play last Saturday.
"It gave me a real adrenalin buzz," he said. "I just wish I could have mustered up some strength to acknowledge their backing.
"Hopefully we can now give them something else to cheer about in the semi-finals."